In 1563, in Florence's Palazzo Vecchio, Giorgio Vasari built in front of an existing wall a new wall on which he painted a mural. Investigators recently discovered a gap between Vasari's wall and the original, large enough to have preserved anything painted on the original. Historians believe that Leonardo da Vinci had painted, but left unfinished, a mural on the original wall; some historians had also believed that by 1563 the mural had been destroyed. However, it is known that in the late 1560s, when renovating another building, Santa Maria Novella, Vasari built a façade over its frescoes, and the frescoes were thereby preserved. Thus, Leonardo's Palazzo Vecchio mural probably still exists behind Vasari's wall.
Which of the following is an assumption on which the argument depends?
A. Leonardo rarely if ever destroyed artworks that he left unfinished.
B. Vasari was likely unaware that the mural in the Palazzo Vecchio had willingly been abandoned by Leonardo.
C. Vasari probably would not have built the Palazzo Vecchio wall with a gap behind it except to preserve something behind the new wall.
D. Leonardo would probably have completed the Palazzo Vecchio mural if he had had the opportunity to do so.
E. When Vasari preserved the frescoes of Santa Maria Novella he did so secretly.
Situation Georgio Vasari built a new wall in front of an existing wall in the Palazzo Vecchio that historians believe had had an unfinished mural by Leonardo da Vinci painted on it. Some historians, however, believe the mural had been destroyed by the time Vasari built the new wall. There is a gap between the old and new wall, large enough to have preserved anything painted on it, as there is in Santa Maria Novella, where Vasari also constructed a new wall in front of an old wall; on that wall, the building's frescoes were preserved.
Reasoning What claim needs to be true for the cited facts to support the conclusion that Leonardo's Palazzo Vecchio mural likely still exists behind Vasari's wall? If there are other equally likely reasons that Vasari would have left a gap between the old wall and a new wall, besides preserving any painting on the old wall, the stated facts would not support the conclusion. After all, it may be only fortuitous that the frescoes in the Santa Maria Novella were preserved when Vasari built the new wall with a gap between it and the old wall. Therefore, the argument depends on assuming that it is unlikely that Vasari would have created a gap between the old and new walls unless he had been trying to preserve something painted on the old wall.
Correct. If there had been other likely reasons for Vasari to have built a gap behind the new wall other than to preserve something painted on the old wall, the cited facts would not be a good reason to believe that Vasari built the gap for the purpose of preserving anything painted on it.